She wrote an article where she explained that Jynx negatively stereotyped African Americans. She wrote that:

The character Jynx, Pokémon #124, has decidedly human features [in contrast to most other characters]: jet-black skin, huge pink lips, gaping eyes, a straight blonde mane and a full figure, complete with cleavage and wiggly hips. Put another way, Jynx resembles an overweight drag queen incarnation of Little Black Sambo, a racist stereotype from a children's book long ago purged from libraries.

Weatherford's complaints did not go unnoticed. Jynx's in-game sprites were given a purple skin colour in the American versions of the Pokémon Gold and Silver (released in 2000). By 2002, Nintendo redesigned Jynx, changing her skin colour from black to purple.

In the animated series of Pokémon, the change of skin colour occurred in 2005. In the mangas, Jynx appears dark gray rather than black, implying that Jynx are purple and not black.

Jynx is based on a Nordic or Viking princess; legends say that the blistering cold turned a princess' skin black

Jynx has origins in Japanese spirits known as Yuki-onna and Yama Uba. Yuki-onna lack feet which is akin to Jynx's feet being covered by her red dress. Yama Uba's traits include a tattered red kimono, blonde hair, control over snow, dark-colored skin and large lips; traits which are evident in Jynx

Jynx may be a parody of or paying homage to the Ganguro or Yamanba fashion trends